Small Amounts of Copper kill CRS?

[Guppy77]

hi all, i just need to check if small amounts of copper can also kill CRS? i just found out that my fertiliser Profito contains copper, evrytime i add 7 to 8 ml tomy 20 gallon tank, 2 crs will die the next day and one to 4 for the week, anyone using this brand?

[hyun007]

Copper has always been know to kill shrimps and snails.
It is impossible to find out the tolerance level of copper as each shrimps varies.
I will not recommend any copper content for your tank.

A person with allergic to peanuts can have very bad reaction or even death even if the portion is not noticeable by eyesight. For a human being, there is always the hospital but sadly there is none for the shrimp and by the time you saw them twitching, that poor shrimp is a goner.

I am sure the people on this forum will be able to recommend you some good fertilizer that is shrimps safe.

[alvinchan80]

I have used Profito with my planted shrimp tank before but I only dose 1-2ml everyday.. My plants also quite alot which might be the reason that my plants absorb faster then what it might kills the shrimps..

[ZackZhou]

Copper has always been know to kill shrimps and snails.
It is impossible to find out the tolerance level of copper as each shrimps varies.
I will not recommend any copper content for your tank.

A person with allergic to peanuts can have very bad reaction or even death even if the portion is not noticeable by eyesight. For a human being, there is always the hospital but sadly there is none for the shrimp and by the time you saw them twitching, that poor shrimp is a goner.

I am sure the people on this forum will be able to recommend you some good fertilizer that is shrimps safe.

actually tiny amount of copper is needed for their molting, as an acticle i read pointed out. some shrimp products carry copper content as well

[hyun007]

actually tiny amount of copper is needed for their molting, as an acticle i read pointed out. some shrimp products carry copper content as well

The problem is most of us does not know what is the safe level for "tiny"?
Will the the copper build up more than "tiny" as time go by when some does not get absorbed by the plants?

Also, some of the food that they eat might already contain copper sulfate to help the molting.

0.10 mgL-1 is a safe level that for sure, BUT unless we have a copper monitoring device, it is going to be quite difficult to monitor.

[ZackZhou]

The problem is most of us does not know what is the safe level for "tiny"?
Will the the copper build up more than "tiny" as time go by when some does not get absorbed by the plants?

Also, some of the food that they eat might already contain copper sulfate to help the molting.

0.10 mgL-1 is a safe level that for sure, BUT unless we have a copper monitoring device, it is going to be quite difficult to monitor.

Bro, there are always Cu Test Kits.

[hyun007]

Bro, there are always Cu Test Kits.

How many of you guys actually test CU every week???
I guess I must be the only lazy one who doesn't and don't need to.

[ZackZhou]

i dont have Cu test kit. hahaha

[Navanod]

Its not just the amount of copper bros, its about the FORM of copper.
Shrimp's "blood" or haemolymph, is copper based, while ours is iron based.
We die if we get directly injected with rust, but we take iron supplements from GNC. Somewhat similar to how certain copper based drugs kills shrimps while copper in food and fertilizers may not.

[Guppy77]

Hi all, just to update, my tank used to be heavily planted, and i always add 8 ml to my 20 gallon tank a week with profito and my shrimps are ok, but ever since i removed my plants and include fewer plants, the shrimps died, anyway i have stop adding profito to the tank and see how it goes will update all of you, RIP CRS

[Navanod]

Hi all, just to update, my tank used to be heavily planted, and i always add 8 ml to my 20 gallon tank a week with profito and my shrimps are ok, but ever since i removed my plants and include fewer plants, the shrimps died, anyway i have stop adding profito to the tank and see how it goes will update all of you, RIP CRS

Have you tested the nitrate levels of the tank bro? If you're dosing same amount of nitrate but with less plants, nitrate build-up can get toxic once its goes above 40ppm.
Also, test for TDS and GH. Those tend to climb when I does ferts aggressively. Without plants to soak up the ferts, TDS may be harmful above 220.

[Guppy77]

Hi Bro, i did not test for nitrate and other things as i do not have those tests kit, but i think my nitrate is under control as i have alot of frogbit floating with its roots hanging in the water, for testing TDS, can i know where to buy the equipment? also is it very expensive? yesterday i did another partial water change and 2 shrimps passed away this morning, i think i should stop changeing water for 2 weeks, no adding of liquide CO2 and Profito, just add the nutrafin solution to for killing chlorine will be ok right? i seriously do not want to meddle with the water from today onwards. its scary waking up or coming back from work to see 1 to 2 dead corpse on the gravel

[Guppy77]

does C328 at clementi there sell TDS meter?

[Guppy77]

sorry also what are the important test kit i need to get? nitrate test, PH test, GH test, is it enough?

[Navanod]

Hi Bro, i did not test for nitrate and other things as i do not have those tests kit, but i think my nitrate is under control as i have alot of frogbit floating with its roots hanging in the water, for testing TDS, can i know where to buy the equipment? also is it very expensive? yesterday i did another partial water change and 2 shrimps passed away this morning, i think i should stop changeing water for 2 weeks, no adding of liquide CO2 and Profito, just add the nutrafin solution to for killing chlorine will be ok right? i seriously do not want to meddle with the water from today onwards. its scary waking up or coming back from work to see 1 to 2 dead corpse on the gravel

You case is starting to sound like how I was losing shrimps awhile ago. I suggest also changing to a non-sulphur based dechlorinator, such as Shizhen. I'm not sure if Nutrafin is sulphur based or not.

does C328 at clementi there sell TDS meter?

Yes, I think they do. Otherwise, you can walk across the road to Green Chapter shop. They have the TDS meter, you can check their GC webstore for the price

sorry also what are the important test kit i need to get? nitrate test, PH test, GH test, is it enough?

If you're certain there's no ammonia issues, then yes, these and the TDS meter should be good enough to tell if there's a major problem with the water.

[Guppy77]

Hi Bro Navanod, thanks alot for your kind advise, seriously i do not know if the declorinator contains sulphur as i guess most manufacturers don't tell, anyway i will not adsd the fertiliser anymore as i say i dound out there is copper in it, also i will get the test kits and see the results and post it here again, hope no more dead bodies later when home, i have 2 pregnant CRS b4 and i guess they are too stressed and lost their eggs very sian